Improvement in cooking-stoves



2 Sheets-Sheet 1.

J. R. SPRAGUE. COOKING-MOVES.

Patented April 2, 1876.

INVENTOR:

".FETERS. PHQm-LHNOGRAPHER. WASHVNGTON D C 2 Sheets-Sheet 2.

J. R. SPRAGUE'. COOKING-MOVES.

Patented April 4, 1876.

\ rllll I I FIG. 2.

l l I I mvm'ron:

N-PETERS, PHOTD-LITHOGRAPHER, WASHINGTON, D C.

UNITED STATES JACOB R. SPRAGUE, OF ST. LOUIS, MISSOURI.

IMPROVEMENT IN COOKlNG-STOVES.

Specification forming part of Letters Patent No. [75,776, dated April 4,1876; application filed May 24, 1875.

To all whom it may concern:

Be it known that I, JACOB R. SPRAGUE, of St. Louis, St. Louis county,State'of Missouri, have invented a certain new and useful Improvement in(looking-Stove or Broiling Apparatus, of which the following is aspecification:

My improvement relates to a down -draft groiling apparatus, combinedwith an oven,

The first part of my improvement consists in a fire-basket, supportedontrunnions, so as to admit of inversion, to present the hotter side ofthe fire upward.

The second part of my improvement consists in constructing the upper andlower sides of the fire-basket to slide out and in, so that thosesides-which constitute the grates propermay be removed to expose thefire, when on top, and may be put in position 'to retain the fire whenthe basket is being turned over, and to form the bottom of the basketafter inversion.

The third part of my improvement consists in the combination of suchrotatable fire basket and case with a chamber beside the same containingan oven or warming-closet, with two flue-chambers beneath the same, intoeither of which the products of combustion may be passed, by the actionof a damper, to regulate the temperature of the oven.

The fourth part of my improvement consists in a damper-closed aperturein the top of the oven, through which the fumes may be allowed to passinto the exit-flue, when desired.

In the drawings, Figure l is a perspective view of my invention. Fig. 2is a longitudinal section at w a", Fig. 3. Fig. 3 is a transversesection at y y, Fig. 2.

The case consists of three longitudinal walls, A B O, and end walls D D.The wall B divides the case into two portions or chambers, E F, of aboutequal size. The chamber E is open at top, while thatF has a close top,G. The fire-basket has ends H and sides I firmly secured together, andwhich form, with the fire-grates K, the fire-basket. This basket issupported on trunnions L and M, having bearings in the bosses of theplates A and B. The trunnion L has a handle, N, by which the basket isturned end over to invert it. The

purpose ofthis is to bring the hotter side of the fire to the top, thedescending draft causing the fire to become highly heated at the bottom,and from the same cause the top is gradually cooled off, so that theinversion of the basket has two useful results: first, to place thehotter side of the fire where it is needed, and, second, to prevent theinjury of the lower grate-bars .by too great heat.

The grate-bar castings are supported by the ends, which slide ingroovesOin the end plates of the basket, so that whichever grate is ontop can be slid from the basket upon the top plate G, exposing the upperface of the fire.

Before inverting the basket, (unless it is desired to discharge thecontents,) the upper grateKis put in place in the basket, and

forms its bottom after it has been turned over.

The basket, when in a horizontal position, as shown in full lines in thedrawings, is held in this position by a bar, 1?, which is hinged at oneend to the case, and which lies upon one corner edge of the basket, thisbar also serving to close the aperture between the basket and the caseat the front side.

Q is the ash-pit, and R the ash-door. S S are openings for the escape ofthe products of combustion from the ash-pit into the'flue-chambers T andU, beneath the oven V. The chant bers T and TI are curved in the samemanner as the oven-bottom plate. Theprodnctsofcombustion escape fromthese chambers through long openings W and W, respectively, and eitherof these openings may be stopped by a damper, so as to cause theproducts of combustion to pass through the other one and through thechamber with which it communicates, the damper being shown at a, and itshandle at 1). Thus the temperature of the oven is regulated, the heattherein being greater when the products of combustion are passingthrough the chamber T than when they are passing through that at U. c isthe chimney. d is an opening in the top of the oven, and communicatingwith the chamber F. This opening may be closed by a damper, (2. Itspurpose is to permit the escape of fumes from the oven into the chimney.

The operation of my improvement is as follows: Suppose both fire-gratesK to be in place in the basket, and the fire burning therein. It may beused to cook meat in this condition until the draft, passingdownwardthrough the fire, causes the top to become in some degree cooled, whenthe grate K may be slipped offthe top to fully expose the upper surfaceof the tire. As the top becomes still further cooled, the heat increasesin the lower partof the fire, and when it is desired to invert thebasket, the grate K is slid forward into position in the basket, and thebasket turned over by means of the handle N.

The basket may be rotated in any direction to invert it, either endover, as described, or turned on its longer axis.

I claim as my invention

